Fill in the blanks.
At a gathering,
910 of the boys and
1719 of the girls and
910 of the adults left after 1 hour.
The number of boys, girls, and adults who remained were the same.
- Number of boys at first = _____ u
- Number of girls at first = _____ u
- Number of adults at first = _____ u
- Number of people who remained = _____ u
(a)
Change fraction into units.
Fraction of the boys who remained
= 1 -
910=
110Fraction of the girls who remained
= 1 -
1719 =
219Fraction of the adults who remained
= 1 -
910 =
110The number of boys, girls and adults who remained is the same.
Make the numerators the same.
LCM of 1, 2 and 1 = 2
1 x 210 x 2 of the boys =
2 x 119 x 1 of the girls =
1 x 210 x 2 of the adults
220 of the boys =
219 of the girls =
220 of the adults
Boys : Girls : Adults
20 : 19 : 20
(a)
Number of boys at first = 20 u
(b)
Number of girls at first = 19 u
(c)
Number of adults at first = 20 u
(d)
Number of people who remained
= 3 x 2 u
= 6 u
Answer(s): (a) 20; (b) 19; (c) 20; (d) 6